Brandão, Roque Filipe MesquitaCarvalho, José BelezaBarbosa, Fernando Maciel2014-02-142014-02-142009978-953-7619-52-7http://hdl.handle.net/10400.22/3893Electricity is regarded as one of the indispensable means to growth of any country’s economy. This source of power is the heartbeat of everything from the huge metropolitans, industries, worldwide computer networks and our global communication systems down to our homes. Electrical energy is the lifeline for any economic and societal development of a region or country. It is central to develop countries for maintaining acquired life styles and essential to developing countries for industrialisation and escaping poverty.engbook part10.5772/7355